Ferguson E, Vaughan A, Swale J. A method for the estimation of total calcium in serum or heparinized plasma.
Clin Chim Acta 1976;
67:281-6. [PMID:
1261044 DOI:
10.1016/0009-8981(76)90336-3]
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Abstract
A simple titrimetric method for the determination of total calcium in serum or heparinized plasma is described. After removing interfering substances with an ion-exchange resin, calcium is reacted with glyoxalbis (2-hydroxyanil), GBA, and the resulting red colour titrated with ethylenediaminetetra-acetic acid in the presence of a methanol/glycerol mixture. No special equipment is used, deproteinization is not necessary and only 0.2 ml of sample is required.
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